Meteorites, and in particular primitive meteorites (chondrites), are irreplaceable probes of
the solar protoplanetary disk. We review their essential properties and endeavour to place …

Laboratory experiments revealed that CO 2 ice particles stick less efficiently than H 2 O ice
particles, and there is an order of magnitude difference in the threshold velocity for sticking …

Compound chondrules, ie chondrules fused together, make a powerful probe of the density
and compositional diversity in chondrule-forming environments, but their abundance among …

Shock-wave heating is a leading candidate for the mechanisms of chondrule formation. This
mechanism forms chondrules when the shock velocity is in a certain range. If the shock …

Among the several candidate models for chondrule formation, the lighting model has been
recognized to be less likely than the other two major models, shock-wave heating and …

As some of the most ancient materials in our Solar System, chondritic meteorites offer a
valuable window into the early stages of planetary formation, particularly the accretion …

Planetesimals are believed to be formed by the coagulation of dust grains in the
protoplanetary disk turbulence. However, the bouncing and fragmentation barriers have not …

A leading candidate for the heating source of chondrules and igneous rims is shock waves.
This mechanism generates high relative velocities between chondrules and dust particles …

Oxygen isotope compositions of chondrules reflect the environment of chondrule formation
and its spatial and temporal variations. Here, we present a theoretical model of oxygen …

Fine-grained rims (FGRs) are frequently found around chondrules in primitive chondrites.
The remarkable feature of FGRs is their submicron-sized and nonporous nature. The typical …